Ebru Bozkurt, H. Gul
Feb 1, 2018
Citations
1
Influential Citations
70
Citations
Quality indicators
Journal
Sensors and Actuators B-chemical
Abstract
Abstract A new and non-toxic pyrazoline derivative (4-[3-(4-hydroxyphenyl)-5-(2-thienly)-4,5-dihydro-pyrazol-1-yl]benzenesulfonamide, compound 1 ) was used for metal ion selectivity based on fluorometric detection. The effects of different metal ions such as Li + , Na + , K + , Ag + , Mg 2+ , Ca 2+ , Ba 2+ , Cd 2+ , Zn 2+ , Cu 2+ , Hg 2+ , Cr 2+ , Pb 2+ , Fe 2+ , Mn 2+ , Co 2+ , Fe 3+ , and Al 3+ were investigated in terms of the photo-physical properties of compound 1 (1 μM). According to the data obtained, the fluorescence intensity of compound 1 has been decreased significantly by Hg 2+ ion in a concentration dependent manner and without interfering the presence of any other metal ion at the medium in contrast to the other seventeen metal ions. The binding constant (8.06 × 10 4 M −1 ) of Hg 2+ to compound 1, LOD value (14.54 μM) of Hg 2+ , possible interaction mechanism between Hg 2+ and compound 1 and the possibility of practical uses of compound 1 as selective fluorometric “turn-off” were reported this study. It was determined that the relative standard deviations (RSD) of four measurements were less than 20%. Novel sensor, compound 1 at 1 μM, showed a linear range in the 20–200 μM Hg 2+ concentration with R = 0.99 value (correlation coefficient). Its response time was less than 1 min. As conclusion, compound 1 seemed as good and selective candidate for fluorometric “turn-off” sensor for Hg 2+ detection.